Business Segments and Related Information, Consolidated Revenues and Expenses (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Consolidated Revenues [Abstract]
Total consolidated revenues		$ 15,417	$ 14,760
Operating costs and expenses:
Cost of sales	[1]	12,005	11,405
Other operating costs and expenses	[2]	1,059	954
Depreciation, amortization and accretion		618	595
Asset impairment charges		10	20
Net gains attributable to asset sales and related matters		(2)	0
General and administrative costs		60	66
Total costs and expenses		13,750	13,040
NGL Pipelines & Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		5,400	5,140
Crude Oil Pipelines & Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		5,121	5,415
Natural Gas Pipelines & Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		1,221	854
Petrochemical & Refined Products Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		$ 3,675	$ 3,351

[1] Cost of sales is a component of “Operating costs and expenses” as presented on our Unaudited Condensed Statements of Consolidated Operations.  Fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.

[2] Represents the cost of operating our plants, pipelines and other fixed assets excluding depreciation, amortization and accretion charges; asset impairment charges; and net gains attributable to asset sales and related matters.